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package segment
import (
"time"
"github.com/mitch000001/go-hbci/domain"
"github.com/mitch000001/go-hbci/element"
)
const EncryptionHeaderSegmentID = "HNVSK"
type EncryptionHeader interface {
ClientSegment
SetClientSystemID(clientSystemID string)
SetSecurityProfile(securityFn string)
SetEncryptionKeyName(keyName domain.KeyName)
SetEncryptionAlgorithm(algorithm *element.EncryptionAlgorithmDataElement)
}
func NewPinTanEncryptionHeaderSegment(clientSystemId string, keyName domain.KeyName) *EncryptionHeaderSegment {
e := &EncryptionHeaderV2{
SecurityFunction: element.NewAlphaNumeric("998", 3),
SecuritySupplierRole: element.NewAlphaNumeric("1", 3),
SecurityID: element.NewRDHSecurityIdentification(element.SecurityHolderMessageSender, clientSystemId),
SecurityDate: element.NewSecurityDate(element.SecurityTimestamp, time.Now()),
EncryptionAlgorithm: element.NewPinTanEncryptionAlgorithm(),
KeyName: element.NewKeyName(keyName),
CompressionFunction: element.NewAlphaNumeric("0", 3),
}
e.ClientSegment = NewBasicSegment(998, e)
segment := &EncryptionHeaderSegment{
encryptionHeaderSegment: e,
}
return segment
}
func NewEncryptionHeaderSegment(clientSystemId string, keyName domain.KeyName, key []byte) *EncryptionHeaderSegment {
e := &EncryptionHeaderV2{
SecurityFunction: element.NewAlphaNumeric("4", 3),
SecuritySupplierRole: element.NewAlphaNumeric("1", 3),
SecurityID: element.NewRDHSecurityIdentification(element.SecurityHolderMessageSender, clientSystemId),
SecurityDate: element.NewSecurityDate(element.SecurityTimestamp, time.Now()),
EncryptionAlgorithm: element.NewRDHEncryptionAlgorithm(key),
KeyName: element.NewKeyName(keyName),
CompressionFunction: element.NewAlphaNumeric("0", 3),
}
e.ClientSegment = NewBasicSegment(998, e)
segment := &EncryptionHeaderSegment{
encryptionHeaderSegment: e,
}
return segment
}
//go:generate go run ../cmd/unmarshaler/unmarshaler_generator.go -segment EncryptionHeaderSegment -segment_interface encryptionHeaderSegment -segment_versions="EncryptionHeaderV2:2:ClientSegment,EncryptionHeaderSegmentV3:3:ClientSegment"
type EncryptionHeaderSegment struct {
encryptionHeaderSegment
}
type encryptionHeaderSegment interface {
EncryptionHeader
Unmarshaler
}
type EncryptionHeaderV2 struct {
ClientSegment
// "4" for ENC, Encryption (encryption and eventually compression)
// "998" for Cleartext
SecurityFunction *element.AlphaNumericDataElement
// "1" for ISS, Herausgeber der chiffrierten Nachricht (Erfasser)
// "4" for WIT, der Unterzeichnete ist Zeuge, aber für den Inhalt der
// Nachricht nicht verantwortlich (Übermittler, welcher nicht Erfasser ist)
SecuritySupplierRole *element.AlphaNumericDataElement
SecurityID *element.SecurityIdentificationDataElement
SecurityDate *element.SecurityDateDataElement
EncryptionAlgorithm *element.EncryptionAlgorithmDataElement
KeyName *element.KeyNameDataElement
CompressionFunction *element.AlphaNumericDataElement
Certificate *element.CertificateDataElement
}
func (e *EncryptionHeaderV2) Version() int { return 2 }
func (e *EncryptionHeaderV2) ID() string { return EncryptionHeaderSegmentID }
func (e *EncryptionHeaderV2) referencedId() string { return "" }
func (e *EncryptionHeaderV2) sender() string { return senderBoth }
func (e *EncryptionHeaderV2) elements() []element.DataElement {
return []element.DataElement{
e.SecurityFunction,
e.SecuritySupplierRole,
e.SecurityID,
e.SecurityDate,
e.EncryptionAlgorithm,
e.KeyName,
e.CompressionFunction,
e.Certificate,
}
}
func (e *EncryptionHeaderV2) SetEncryptionKeyName(keyName domain.KeyName) {
e.KeyName = element.NewKeyName(keyName)
}
func (e *EncryptionHeaderV2) SetEncryptionAlgorithm(algorithm *element.EncryptionAlgorithmDataElement) {
e.EncryptionAlgorithm = algorithm
}
func (e *EncryptionHeaderV2) SetClientSystemID(clientSystemId string) {
e.SecurityID = element.NewRDHSecurityIdentification(element.SecurityHolderMessageSender, clientSystemId)
}
func (e *EncryptionHeaderV2) SetSecurityProfile(securityFn string) {
// NO OP
}
func NewPinTanEncryptionHeaderSegmentV3(clientSystemId string, keyName domain.KeyName) *EncryptionHeaderSegment {
e := &EncryptionHeaderSegmentV3{
SecurityProfile: element.NewPinTanSecurityProfile(1),
SecurityFunction: element.NewCode("998", 3, []string{"4", "998"}),
SecuritySupplierRole: element.NewCode("1", 3, []string{"1", "4"}),
SecurityID: element.NewRDHSecurityIdentification(element.SecurityHolderMessageSender, clientSystemId),
SecurityDate: element.NewSecurityDate(element.SecurityTimestamp, time.Now()),
EncryptionAlgorithm: element.NewPinTanEncryptionAlgorithm(),
KeyName: element.NewKeyName(keyName),
CompressionFunction: element.NewCode("0", 3, []string{"0", "1", "2", "3", "4", "5", "6", "7", "999"}),
}
e.ClientSegment = NewBasicSegment(998, e)
segment := &EncryptionHeaderSegment{
encryptionHeaderSegment: e,
}
return segment
}
type EncryptionHeaderSegmentV3 struct {
ClientSegment
SecurityProfile *element.SecurityProfileDataElement
// "4" for ENC, Encryption (encryption and eventually compression)
// "998" for Cleartext
SecurityFunction *element.CodeDataElement
// "1" for ISS, Herausgeber der chiffrierten Nachricht (Erfasser)
// "4" for WIT, der Unterzeichnete ist Zeuge, aber für den Inhalt der
// Nachricht nicht verantwortlich (Übermittler, welcher nicht Erfasser ist)
SecuritySupplierRole *element.CodeDataElement
SecurityID *element.SecurityIdentificationDataElement
SecurityDate *element.SecurityDateDataElement
EncryptionAlgorithm *element.EncryptionAlgorithmDataElement
KeyName *element.KeyNameDataElement
// 0: no compression (NULL)
// 1: Lempel, Ziv, Welch (LZW)
// 2: Optimized LZW (COM)
// 3: Lempel, Ziv (LZSS)
// 4: LZ + Huffman Coding (LZHuf)
// 5: PKZIP (ZIP)
// 6: deflate (GZIP) (http://www.gzip.org/zlib)
// 7: bzip2 (http://sourceware.cygnus.com/bzip2/)
// 999: Gegenseitig vereinbart (ZZZ)
CompressionFunction *element.CodeDataElement
Certificate *element.CertificateDataElement
}
func (e *EncryptionHeaderSegmentV3) Version() int { return 3 }
func (e *EncryptionHeaderSegmentV3) ID() string { return EncryptionHeaderSegmentID }
func (e *EncryptionHeaderSegmentV3) referencedId() string { return "" }
func (e *EncryptionHeaderSegmentV3) sender() string { return senderBoth }
func (e *EncryptionHeaderSegmentV3) elements() []element.DataElement {
return []element.DataElement{
e.SecurityProfile,
e.SecurityFunction,
e.SecuritySupplierRole,
e.SecurityID,
e.SecurityDate,
e.EncryptionAlgorithm,
e.KeyName,
e.CompressionFunction,
e.Certificate,
}
}
func (e *EncryptionHeaderSegmentV3) SetEncryptionKeyName(keyName domain.KeyName) {
e.KeyName = element.NewKeyName(keyName)
}
func (e *EncryptionHeaderSegmentV3) SetEncryptionAlgorithm(algorithm *element.EncryptionAlgorithmDataElement) {
e.EncryptionAlgorithm = algorithm
}
func (e *EncryptionHeaderSegmentV3) SetClientSystemID(clientSystemId string) {
e.SecurityID = element.NewRDHSecurityIdentification(element.SecurityHolderMessageSender, clientSystemId)
}
func (e *EncryptionHeaderSegmentV3) SetSecurityProfile(securityFn string) {
if securityFn == "999" {
e.SecurityProfile = element.NewPinTanSecurityProfile(1)
} else {
e.SecurityProfile = element.NewPinTanSecurityProfile(2)
}
}
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